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Finding the Fourth Proportional to 2,514.64, 3,771.56 and 871.12

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Solution

The fourth proportional to 2,514.64, 3,771.56 and 871.12 is: 1,306.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,514.64 : 3,771.56 = 871.12 : x
  2. Step 2: Convert to fraction form
    2,514.64/3,771.56 = 871.12/x
  3. Step 3: Cross multiply
    2,514.64x = 3,771.56 × 871.12
  4. Step 4: Simplify right side
    2,514.64x = 3,285,481.35
  5. Step 5: Solve for x
    x = 3,285,481.35/2,514.64
  6. Step 6: Final answer
    x = 1,306.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.